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(No Model.) 3 Sheets-Sheet l.

E. P. WARNER.

ARMATURB FOR DYNAMO ELECTRIC MACHINES. No. 346,965. Patented Aug. 10, 1886.

Discs K mew/J 5V2; rdemredt (No Model.) 3 Sheets-Sheet 2.

E. P. WARNER.

ARMATURE FOR DYNAMO ELECTRIC MACHINES. No. 346,965. Patented Aug. 10, 1886.

a 1 FWEWIIIIIIMIIJIIIIIM (No Model.) 3 Sheets-Sheet 3.

E. P. WARNER.

ARMATURB FOR DYNAMO ELECTRIC MACHINES. No. 346,965. Patented Aug. 10, 1886.

"' Ivouemvwf N. PLIERS. FivoKn-LHhognphzr, Waihmghm, U. C.

UNITED STATES PATENT O rice.

ERNEST P. \VARNER, OF CHICAGO, ILLINOIS, ASSlGIlUlt THE \VESTERN ELECT tit CODHANY, OF SAME PLACE.

ARMATURE FOR BYNAMQ-ELECTRES MACl-HNEES.

seamstress-tom forming part of Letters Patent we. 3 16,9 6 dated August Applieation filed August lSSl. Serial No. lllfi H. (No model.)

To (LZZ whom it may concern: spider. Thus ring a is supported by spider Re it known that I, ERNEST l. XV; nXEn, a d, as shown in Figs. (3 and 7. The annuli c, citizen of the United States, residing at (Jhiwhich form the magnetic field or core of the cage, in the county of Cook and State of llli armature, are of thin, soft sheet-iron, as shown 5 nois, have invented a certain new and useful more clearly in Fig. 2. Theseannnliare scpa- Improvement in Armatures for DynainoElcerated from each other, preferably, by insulat trie Machines, of which the following is a full, ing spacing-disks of asbestus, as shown in clear, concise, and exact description, reference Figs. l and 2. Asbestus is somewhat porous beinghad to theaccompanying drawings, formand also highly refractory. I therefore prefer 1 ing a part of this specification. asbestus to any other insulating material. 1t

The objects of my invention are to prevent is evident, however, that other non-coiulucting heating, to prevent sparking at the commumaterials may be used with satisfactory retator, to secure perfect insulation between the sults. Thebarsgaresupported byslings h, the coils, and in general to produce the greatest asbestus papcri' interposed serving to insulate I5 amount of current from a given power. the bars fromtheslings,asshown. Thcseslings My invention consists in the construction are preferably of brass, and are suspended of the various parts of the drum ofthe armafrom the outer rings, a and a, by means of tu re, and in winding the coils thereon,as herescrews h. The bars r are insulated from the in described and claimed. annuli by means of asbestuspaper strips 1, as

2 My invention is illustrated in the aeconipashown in Fig. 8. it will be seen that when nying drawings, in which Figure 1 is a side the screws 1.- are turned up the bars will be View, partially in section,of the armature withbrought outwardly against the inner edges of out the coils. Fig. 2 is a detailed view of one the softironannnli c, as shown in Fig. l, and of the soft sheet-iron rings or annuli which since the outer edges of the bars are made 25 form the core or inner magnetic field of the rounding, the asbestos covering will be held armatn re. Fig. 3 is a detailed view of a porfirmly between the edges of the bars and the tion of one of the bars, which are placed parinner edges of the annuli. Rings m in, of as allel with the shaft of the armature, and serve best-us or other insulating material, are placed to support the annnli. Fig. 4 is a detailed about the shalt outside the brass carriers a a,

go view showing one of the outer brass rings and and serve to insulate the coils of wire from the central brass ring of the armature, said the brass. Parallel strips a a, of asbestus or rings being provided with lugs, which sup otherinsulatingmaterial, are placed about the port and carry the coils of the wire wound outer ends of the shaft, as shown in Figs. 1, 4, upon the armature. Fig. 5 is an end view of 6, and '7, and serve to keep the wire away from 5 a commutator, showing the manner in which the metal shaft. 7 the coils are connected to the commutator. I will now describe the manner-in which I Fig. 6 is an end View of the armature with the wind the coils about the armature. The frame insulatingrings removed, so as to show the or drum of the armature is placed horizoneonstruction of the brass ring and the brass tally, the journals resting upon supports or 0 spider by which the brass ring is supported crotches, which allow it to be turned freely by from the shaft. The insulated slings for supthe workman while winding on the insulated porting the bars are also shown. Fig. 7 is a wire. The brass rings a a a are so placed view of the armature seen from section line that the coilspaccs between the lugs will be .r :c of Fig. l, with the lield'magnets. in line, as shown in Figs. 1 and at. I have 5 Like parts are indicated by similar letters shown thirty-two of these spaces, thus giving of reference in the different figures. room for sixteen coils of wire passing entirely The rings or carriers a a a are preferably about the drum from end to end. 1 wind each of brass or other non-magnetic metal, and are of the coils so that all the convolntions will be provided with lugs Z). These brass rings are included within one space on one side of the 50 each supported from the shaft 0 by a brass armature, while on the opposite side of the T00 armature the convolutions will be distributed between two or more spaces, preferably two.

Heretofore it has been common to wind the different coils so that all the convolutions of each will come in spaces diametrically opposite. By my method of winding the space directly opposite the one which includes the whole of any given coil does not include any of the convolutions of said given coil, but the convolutions are divided half and half between the spaces on each side of the space which is diametrically opposite the space containing all the convolutions.

As shown in Fig. 7, the spaces marked 1, 2, 820., to 16 indicate the order in which the coils are wound upon the drum and the positions which they occupy, respectively. The spaces marked 1, 2, 850., to 16 will be each filled by the convolutions ofa single coil. while the other spaces, marked a, g, &c., to will each be filled by one-half of the convolutions of the two coils indicated by the two digits of said spaces, respectively. The coils are wound in layers. Each layer may consist of eight convolutions, as shown, and each coil may consist of eight layers or sixty-four convolutions. The coils are thus wound in the same direction and connected together, the inner end of one coil being joined to the outer end of the next coil, and from the joint a connection leads to a segment of the commutator. This is illustrated in Fig. 5, the arrows indicating the direction of the current in the different coils. By thus distributing the convolutions of the coils on one side of the armature, sparking at the commutator is prevented or reduced and the efficicnt strength of the current increased.

One of the reasons why sparking at the commutator is prevented by my invention is the fact that the divided portions of any given coil are so disposed with respect to. the magnetic field that they tend to generate currents in opposite directions, respectively, at the moment the opposite or undivided portion of the coil passes the neutral point, the coil being thus rendered neutral.

I claim-- 1. The combination, in the armature of a dynamo-electric machine, of the bars g, the thin soft-iron rings, and the strips of insulating material, Z, interposed between said rings and the different bars or supports 9, whereby the rings and bars are insulated, substantially as and for the purpose specified. I

2. The combination, in the armature of a dynamo-electric machine, of the brass rings a a a provided with lugs b b, the shaft of the armature, and spiders for supporting the brass rings, substantially as and for the purpose specified.

3. The combination, with the brass rings or carriers provided with-spaces for the coils, of yokes h, insulated from bars 9, the bars g, held against the annuli and insulated therefrom, and the coils of the armature, as and for the purpose specified.-

4. The combination, with the drum of a dynamoelectric machine, of coils wound in the spaces provided thereon, as described, all the convolutions of each coil being included within its space on one side of the drum and distributed or divided between two or more spaces on the opposite side, substantially as specified.

5. The combination, upon the shaft of a dynamo-electric machine, of ashestus rings or circular pieces m m and asbestus strips 02 n, substantially. as shown and described.

6. The combination, with the coils of a dynamo-electric machine, of the shaft, the insulating-rings m m, and the strips 01 it, placed upon the shaft, whereby the coils are insulated from the shaft, substantially as and for the purpose specified.

' In witness whereof Ihereunto subscribe'my name this 22d (lay of August, A. D. 1884.

ERNEST P. XVARNER. \Vitnessesr GEORGE P. BARTON, H. ()DELL. 

